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rxrpc: Add a tracepoint to log received ACK packets

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Add a tracepoint to log information from received ACK packets.

Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
David Howells 2016-09-17 10:49:13 +01:00
parent a124fe3ee5
commit ec71eb9ada
2 changed files with 28 additions and 0 deletions
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26
include/trace/events/rxrpc.h
View file

@ -234,6 +234,32 @@ TRACE_EVENT(rxrpc_transmit,
__entry->tx_top - __entry->tx_hard_ack)
);
TRACE_EVENT(rxrpc_rx_ack,
TP_PROTO(struct rxrpc_call *call, rxrpc_seq_t first, u8 reason, u8 n_acks),
TP_ARGS(call, first, reason, n_acks),
TP_STRUCT__entry(
__field(struct rxrpc_call *, call )
__field(rxrpc_seq_t, first )
__field(u8, reason )
__field(u8, n_acks )
),
TP_fast_assign(
__entry->call = call;
__entry->first = first;
__entry->reason = reason;
__entry->n_acks = n_acks;
),
TP_printk("c=%p %s f=%08x n=%u",
__entry->call,
rxrpc_acks(__entry->reason),
__entry->first,
__entry->n_acks)
);
#endif /* _TRACE_RXRPC_H */
/* This part must be outside protection */

2
net/rxrpc/input.c
View file

@ -440,6 +440,8 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb,
hard_ack = first_soft_ack - 1;
nr_acks = buf.ack.nAcks;
trace_rxrpc_rx_ack(call, first_soft_ack, buf.ack.reason, nr_acks);
_proto("Rx ACK %%%u { m=%hu f=#%u p=#%u s=%%%u r=%s n=%u }",
sp->hdr.serial,
ntohs(buf.ack.maxSkew),